MapleBOM

Tariff exposure

How exposed is your product to U.S. sourcing and tariffs?

MapleBOM reads your bill of materials and shows which components, suppliers and purchasing dollars create foreign sourcing exposure — including the lines with no country of origin on file at all.

Analyze a sample BOM Analyze my BOM

MapleBOM does not calculate tariff liability, and nothing here is a regulatory determination. It gives you what every tariff calculation needs first: an accurate, honest picture of reported origin across your BOM.

BOM uploads are analyzed transiently in memory and are not retained. How this works

Sample analysis Synthetic data
Components
1,536
40 suppliers
Annual purchasing
$11.76M
from the file alone
Reported origin
78.8%
of purchasing
Provenance gap
$2.49M
480 components unresolved
Origin exposure by annual purchasing
Canada — 23.6% of annual purchasing ($2,772,986) United States — 13.8% of annual purchasing ($1,619,830) China — 10.5% of annual purchasing ($1,229,844) Mexico — 7.3% of annual purchasing ($856,070) Other countries — 23.7% of annual purchasing ($2,783,332) Unknown / Unverified — 21.2% of annual purchasing ($2,494,139)
Canada 23.6% United States 13.8% China 10.5% Mexico 7.3% Other countries 23.7% Unknown / Unverified 21.2%
Built from a 1,536-component industrial BOM Open the full analysis →

The problem

The tariff question always stalls in the same place.

Somebody asks what a tariff change costs you. The answer needs origin and classification for every affected line. What exists is a BOM with a country column that is a third empty, a broker who has some of it, and a week of emails. By the time you have a number, the question has moved on.

01

Origin drives duty, not your supplier

A part bought from a Canadian distributor can be manufactured anywhere. Duty follows the factory, not the invoice.

02

The gaps are where the risk hides

The lines with no recorded origin are exactly the ones you cannot model. They are usually not the cheap ones.

03

Classification comes after origin

HS codes only help once you know what you are classifying and where it came from. Most BOMs have neither on every line.

The core output

Start with the lines you cannot answer for.

MapleBOM ranks every component with no established origin by the money attached to it — the exact lines that would break a tariff model.

In the sample analysis, 480 components have no established country of origin — but 10 supplier conversations would account for 80% of that exposure.

See it on sample data

Unresolved origin, ranked by spend

Sample
Component Supplier Annual purchasing
Skid frame assembly, welded and m… Ironwood Structural Compo… $157,233
Variable frequency drive, 75 kW 4… Trillium Automation Supply $69,707
Servo drive, 1.5 kW dual axis Trillium Automation Supply $61,917
Guarding package, perimeter fence… Bluewater Enclosure Syste… $60,869
Panel air conditioner, 1200 W 480… Meridian Electrical Supply $51,269
Conveyor module, 3 m belt section… Ironwood Structural Compo… $49,693
Origin shown as unknown because the file did not establish one — never because we could not guess.

What you get

A prioritized exposure view of one product, in about ten seconds.

  1. Find the focus rows

    Components ranked by covered annual spend, with the evidence and next fact behind each priority.

  2. Separate the evidence

    Reported origin and supplier country shown as separate views, with Unknown / Unverified kept visible instead of inferred.

  3. Leave with a worklist

    Missing economic inputs, supplier concentration and downloadable rows make the next conversation finite.

What MapleBOM will not do

Provenance is only useful if it is true. These are the rules the analysis follows, without exception:

  • We never infer country of origin from a supplier, manufacturer, distributor or company nationality. Buying a part from a Canadian distributor does not make it Canadian.
  • Anything the file does not establish is reported as Unknown / Unverified, with the reason it is unresolved.
  • Country values we cannot interpret are surfaced, not silently dropped or guessed.
  • V0 makes no CUSMA, tariff, Canadian-content or Buy Canadian determination. Those require rules and evidence this tool does not yet have.
  • Facts you supplied, figures we calculated, and information nobody has are labelled separately throughout.
Future research Show four optional questions

These capabilities are not built. The current product is the Supply Chain Exposure analysis above.

Private beta

Tariff exposure

Understand which components and purchasing categories may be affected by changing tariffs.

Calculate tariff exposure → Private beta

Canadian content and CUSMA

Identify documentation gaps and the components that would need deeper qualification.

Analyze Canadian content → Private beta

Canadian supplier alternatives

Discover foreign components that may have Canadian manufacturing or sourcing alternatives.

Find Canadian suppliers → Private beta

Resolving unverified origins

Track evidence and supplier attestations for the components nobody can currently vouch for.

Resolve unknown origins →

None of these are built. Clicking one tells us which capability you want, not what you would get back — no figure anywhere else in MapleBOM depends on one that does not exist. The current report remains the Supply Chain Exposure analysis shown above.

Built in Canada

An independent project.

MapleBOM is built by Tyson Hamilton, a Canadian software engineer building better trade and supply-chain tools for Canadian manufacturers.

It is early, and deliberately narrow: it reports what your bill of materials establishes, and says plainly what it does not.

Questions, feedback, or interested in trying MapleBOM with your own data?

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